Citation: Wei-Feng YOU, Xiao XU, Ai-Hui CAO, Zhi-Jie TAO, Long-Tian KANG. Synthesis of Axially Coordinated Cobalt Porphyrin/graphene Oxide Nanocomposite for Enhanced Electrocatalytic CO₂ Reduction to CO[J]. Chinese Journal of Structural Chemistry, ;2022, 41(3): 220300. doi: 10.14102/j.cnki.0254-5861.2011-3247 shu

Synthesis of Axially Coordinated Cobalt Porphyrin/graphene Oxide Nanocomposite for Enhanced Electrocatalytic CO₂ Reduction to CO

Wei-Feng YOU ^{a, b, c} ,
Xiao XU ^{a, b} ,
Ai-Hui CAO ^{a, b, c} ,
Zhi-Jie TAO ^{a, b} ,
Long-Tian KANG ^{a, b,,}

a.
Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
b.
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China
c.
University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: Long-Tian KANG, longtiank@fjirsm.ac.cn
Received Date: 7 May 2021
Accepted Date: 15 May 2021

Fund Project: the National Natural Science Foundation of China 21705150the National Natural Science Foundation of China 21473204Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China 2021ZR124

Figures(6)

The electrocatalysts containing cobalt-pyrrolic nitrogen-carbon (Co-N₄-C) moiety for CO₂ reduction reaction (CO₂RR) have caught much attention. However, the effects of Co valence state and its synergy with graphene substrate are not clear yet. In this work, cobalt porphyrin (CoTPP) molecule with the intrinsic Co-N₄-C moiety is successfully combined with graphene oxide (GO) via three kinds of liquid-phase methods. The ratio of CoTPP to GO and the valence state of Co atom are studied to explore their catalysis for CO₂RR to CO. It is found that axially-coordinated Co(Ⅲ)TPPCl/GO nanocomposites synthesized via a chemical method exhibit better ability for CO₂RR, as compared with Co(Ⅱ)TPP+GO and/or Co(Ⅲ)TPPCl+GO nanocomposites obtained via a physically mixing way. After optimizing the ratio of CoTPP to GO, the Faradaic efficiency (FE) is more than 90% for CO₂RR to CO between −0.7 and −0.8 V vs. reversible hydrogen electrode (RHE) in Co(Ⅲ)TPPCl/GO75. The synergy between CoTPP and GO and the effect of Co valence state are systematically investigated, indicating that their strong interaction plays the key role in electrocatalytic CO₂RR.
- cobalt porphyrin,
- graphene oxide,
- axial coordination,
- carbon dioxide reduction,
- synergistic catalysis
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Synthesis of Axially Coordinated Cobalt Porphyrin/graphene Oxide Nanocomposite for Enhanced Electrocatalytic CO2 Reduction to CO

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通讯作者: 陈斌, bchen63@163.com

Synthesis of Axially Coordinated Cobalt Porphyrin/graphene Oxide Nanocomposite for Enhanced Electrocatalytic CO₂ Reduction to CO